Ventilation pipeline connecting structure

Abstract

The utility model relates to a ventilation pipeline connecting structure, and belongs to the technical field of pipeline engineering. The ventilation pipeline connecting structure comprises a base, sliding seats are arranged on the two sides of the end face of the base, and the sliding seats are in sliding fit with the base; the clamp is arranged on the sliding seat and comprises two pipe clamps which are oppositely arranged, a pipe cavity used for fixing a pipeline is defined by the two pipe clamps, and the distance between the two pipe clamps is adjustable. According to the scheme provided by the utility model, pipelines with different pipe diameters can be adapted by adjusting the size of the pipe cavity, and the positions of the pipelines can be adjusted through the sliding seat, so that the requirement of dismounting a clamp is omitted, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline engineering, in particular to a ventilation pipeline connection structure. Background Art

[0002] Mechanical and electrical engineering (MEP) in building construction is a complex and critical process, encompassing multiple aspects of a building's functionality and quality. From water supply and drainage to power supply and intelligent systems, every detail carries the mission of enhancing living and working comfort. In future building developments, MEP engineering will increasingly incorporate intelligent, energy-efficient, and environmentally friendly concepts, creating a more comfortable, convenient, and safer living environment for people.

[0003] In the prior art, during the installation and fixing of pipes, one end of the pipe clamp is fixed to a fixed structure, and the other end clamps the pipe. After the pipe is fixed by the pipe clamp, if the position of the pipe needs to be adjusted, the pipe clamp can only be removed and reinstalled and fixed. The above-mentioned fixing method not only increases the difficulty of operation for the staff, but also easily damages the fixed structure such as the wall, resulting in the need to change the position for installation and fixing, thereby reducing the overall structural stability of the pipe connection. Utility Model Content

[0004] In order to overcome the problems existing in the related technology, the utility model provides a ventilation duct connection structure, which can adapt to pipes of different diameters by adjusting the size of the pipe cavity, and can also adjust the position of the pipe through a sliding seat, eliminating the need to disassemble the clamp and effectively improving construction efficiency.

[0005] A first aspect of the present invention provides a ventilation duct connection structure, comprising a base, wherein both sides of the end surface of the base are provided with sliding seats, and the sliding seats are in sliding cooperation with the base;

[0006] The clamp is arranged on the sliding seat and includes two pipe clamps arranged opposite to each other. The two pipe clamps enclose a pipe cavity for fixing the pipe, and the distance between the two pipe clamps is adjustable.

[0007] In a possible implementation of the first aspect above, a bottom plate is further included, and support mechanisms are provided on both sides of the bottom plate. The support mechanisms are connected to the base and are used to fix the base.

[0008] In a possible implementation of the first aspect above, buffer assemblies are further symmetrically arranged on the base plate, a line between two of the buffer assemblies is perpendicular to a line between the two support mechanisms, and the buffer assemblies are used to buffer the base.

[0009] In a possible implementation of the first aspect, accommodating grooves are provided on both sides of the bottom plate;

[0010] The support mechanism includes a shaft, a first spring, two movable rings and two connecting rods;

[0011] The spring passes through the shaft, the two movable rings are located at both ends of the spring and are slidably connected to the shaft, the first end of the connecting rod is hinged to the movable ring, and the second end is hinged to the base, and the shaft is set on the accommodating groove.

[0012] In a possible implementation of the first aspect above, the buffer assembly includes a mounting seat, a second spring, and a movable rod;

[0013] At least one sliding hole is provided on the outer edges of both sides of the base, the movable rod passes through the sliding hole, and the head of the movable rod is clamped with the base;

[0014] The second spring is sleeved on the movable rod, the movable rod is connected to the mounting seat, and the mounting seat is arranged on the outer edges of both sides of the bottom plate.

[0015] In a possible implementation of the first aspect above, the number of the movable rods and the second springs are both three, the end surface of the middle part of the mounting seat is higher than the end surfaces on both sides of the mounting seat, and the end surface of the middle part of the mounting seat and the end surfaces on both sides of the mounting seat are both provided with the movable rods.

[0016] In a possible implementation of the first aspect above, the sliding seat includes a positioning frame and a slider, the positioning frame has a U-shaped cross-section, the slider has a T-shaped cross-section, a slide groove is provided on the base, the positioning hole is located on the top end surface of the base, the slider is located on the bottom end surface of the base, one end of the slider passes through the slide groove and is connected to the positioning frame;

[0017] The pipe clamps are respectively threadedly connected to both ends of the positioning frame.

[0018] In a possible implementation of the first aspect above, limiting rods are further provided at both ends of the positioning frame, and the limiting rods are used to limit the travel of the pipe clamp.

[0019] In a possible implementation of the first aspect above, the pipe clamp includes an adjusting rod and a clamping ring, the adjusting rod is threadedly connected to the sliding seat, the first end of the adjusting rod is connected to the clamping ring, the second end of the adjusting rod is provided with a rotating handle, and the clamping ring has an arc-shaped clamping surface.

[0020] In a possible implementation of the first aspect above, an anti-slip structure is further provided on the arc-shaped clamping surface, and the anti-slip structure is any one of an anti-slip gasket, an anti-slip rib, or an anti-slip protrusion.

[0021] The technical solution provided by the utility model may have the following beneficial effects:

[0022] Using the technical solution of the present invention, the operator first installs the base on the fixed structure, then adjusts the distance between the two pipe clamps to ensure smooth insertion of the pipe into the lumen. After the pipe clamps secure the pipes, the operator adjusts the relative position of one of the pipes by moving the sliding seat, allowing the two pipes to be connected and finally sealed. The ventilation duct connection structure provided by the present invention solves the problem of requiring disassembly, avoids damage to the fixed structure, reduces the operator's labor intensity, and improves the portability of pipe installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0024] Figure 1 This is a schematic diagram of the overall structure of the ventilation duct connection structure shown in Example 1 of the present utility model;

[0025] Figure 2 This is an exploded schematic diagram of the ventilation duct connection structure shown in Example 1 of the present utility model;

[0026] Figure 3 This is a schematic diagram of the assembly of the sliding seat and the pipe clamp shown in Example 1 of the present utility model;

[0027] Figure 4 This is a schematic structural diagram of the support assembly shown in Example 1 of the present utility model;

[0028] Figure 5 This is a schematic structural diagram of a buffer assembly shown in Example 1 of the present utility model;

[0029] Figure 6 This is a schematic structural diagram of the anti-slip structure shown in Example 1 of the present utility model;

[0030] Figure 7 This is a schematic structural diagram of the anti-slip structure shown in Example 2 of the present utility model;

[0031] Figure 8 It is a structural schematic diagram of the anti-slip structure shown in Example 3 of the present utility model. Description of the drawings:

[0033] 1. Base; 10. Slide;

[0034] 2. Sliding seat; 20. Positioning frame; 21. Slider;

[0035] 3. Pipe clamp; 30. Adjustment rod; 31. Clamping ring; 31a. Anti-slip pad; 31b. Anti-slip rib; 31c. Anti-slip protrusion; 32. Limit rod;

[0036] 4. Bottom plate; 40. Accommodation groove;

[0037] 5. Support mechanism; 50. Shaft; 51. First spring; 52. Moving ring; 53. Connecting rod;

[0038] 6. Buffer assembly; 60. Mounting seat; 61. Second spring; 62. Movable rod. DETAILED DESCRIPTION

[0039] The following describes preferred embodiments of the present invention in more detail with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] In the prior art, during the process of installing and fixing the pipe, one end of the pipe clamp 3 is fixed to the fixed structure, and the other end clamps the pipe. After the pipe is fixed by the pipe clamp 3, if the position of the pipe needs to be adjusted, the pipe clamp 3 can only be removed and re-installed and fixed. The above-mentioned fixing method not only increases the difficulty of operation for the staff, but also easily damages the fixed structure such as the wall, resulting in the need to change the position for installation and fixing, thereby reducing the overall structural stability of the pipe connection.

[0044] In response to the above problems, the utility model provides a ventilation duct connection structure that can adapt to pipes of different diameters by adjusting the size of the pipe cavity, and can also adjust the position of the pipe through the sliding seat 2, eliminating the need to disassemble the clamp and effectively improving construction efficiency.

[0045] The technical solutions of the embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0046] Example 1

[0047] Figure 1 This is a schematic diagram of the overall structure of the ventilation duct connection structure shown in Example 1 of the present utility model;

[0048] Figure 2 It is an exploded schematic diagram of the ventilation duct connection structure shown in Example 1 of the present utility model.

[0049] See also Figure 1 and Figure 2 , a ventilation duct connection structure provided by embodiment 1 of the present invention includes a base 1, and sliding seats 2 are provided on both sides of the end surface of the base 1, and the sliding seats 2 are slidably matched with the base 1;

[0050] The clamp is arranged on the sliding seat 2 and includes two pipe clamps 3 arranged opposite to each other. The two pipe clamps 3 enclose a lumen for fixing the pipeline, and the distance between the two pipe clamps 3 is adjustable.

[0051] Building construction mechanical and electrical engineering refers to the installation of mechanical and electrical equipment in buildings, including the installation and commissioning of electrical, water supply and drainage, HVAC, fire protection and other systems. In the HVAC system, it includes the installation and commissioning of air-conditioning equipment, ventilation ducts and ventilation equipment.

[0052] When the ventilation duct connection structure is in use, the base 1 is installed on a fixed support, such as a wall, an indoor support column, a ceiling or other support, and the base 1 and the fixed support can be connected by bolts. The operator installs the base 1 on the fixed support according to the requirements of the building construction and mechanical and electrical engineering, and then adjusts the distance between the pipe clamps 3 so that the pipe can be smoothly inserted into the pipe cavity. The two clamps in the connection structure fix the ends of the two pipes respectively. After the pipe mouths of the two pipes are aligned, the distance between the two pipe clamps 3 is adjusted so that the pipes can be clamped, thereby facilitating the sealing connection of the two pipes. During the installation process, the position of the pipes may be offset. In this case, the position between the two pipes can be readjusted by toggling the sliding seat 2, thereby avoiding the connection strength between the pipes and between the pipes and the connection structure being too strong, which may cause the sealing connection of the pipes to fail or the ventilation duct connection structure to bend.

[0053] The ventilation duct connection structure provided by the present invention solves the problem of needing to disassemble the entirety, thus avoiding damage to the fixed structure. In addition, the pipe clamp 3 can adapt to pipes of different diameters, thereby reducing the labor intensity of operators and improving the portability of pipe installation.

[0054] On the basis of the above specific implementation manner, in order to ensure the stability of the pipeline, the above ventilation duct connection structure also includes a base plate 4, two symmetrically arranged buffer mechanisms and two symmetrically arranged support mechanisms 5. The buffer mechanism and the support mechanism 5 are both arranged on the base plate 4. The buffer mechanism is used to buffer the base 1, and the support mechanism 5 is used to support the base 1.

[0055] Specifically, the base plate 4 and base 1 can be rectangular plate-like structures made of iron materials, such as cast iron, to provide sufficient strength and ensure secure installation of the pipe. In actual applications, they can also be circular plate-like structures, depending on actual needs. The base plate 4 and base 1 both have a top surface, a bottom surface, and four side surfaces. During assembly, the top surface of the base 1 is used to mount the sliding seat 2, while the bottom surface is connected to the support mechanism 5 and the buffer mechanism. The top surface of the base plate 4 is connected to the support mechanism 5 and the buffer mechanism. Air flowing through the pipe can easily cause pipe vibration, or other factors can cause pipe vibration. Without a buffer mechanism, the ventilation duct can vibrate and collide with the pipe connection structure. Since the pipe structure is generally rigid, this can easily damage the pipe. To prevent this, a buffer mechanism is provided to provide the ventilation duct connection structure with anti-vibration and shock-absorbing functions. When the base plate 4 is provided, the base plate 4 is mounted on a fixed support. The support mechanism 5 connects the base plate 4 and base 1, providing support and, through the buffer mechanism, offsets vibration of the ventilation duct, thereby improving the structural stability of the pipe.

[0056] It should be noted that the positions of the buffer mechanism and the support mechanism 5 on the bottom surface of the base plate 4 are not restricted. In this embodiment, it is only necessary to ensure that the two buffer mechanisms and the two support mechanisms 5 are symmetrically arranged.

[0057] Furthermore, the connection line between the two buffer mechanisms of the ventilation duct connection structure is perpendicular to the connection line between the two support mechanisms 5 , and the buffer mechanism and the support mechanism 5 are connected to the outer edge of the bottom end surface of the base 1 .

[0058] The top surface of the bottom plate 4 has four side edges. In order to ensure the connection stability between the bottom plate 4 and the base 1, the four sides can be divided into up, down, left and right. The support mechanism 5 can be located at the left and right positions of the bottom plate 4, and the buffer mechanism can be located at the upper and lower positions of the bottom plate 4. Under this setting, it can be ensured that there is good connection stability between the bottom plate 4 and the base 1, and the overall firmness of the pipeline connection is guaranteed. In this embodiment, the size of the bottom plate 4 is similar to that of the base 1.

[0059] like Figure 2 and Figure 4 As shown, further, the bottom plate 4 of the ventilation duct connection structure is provided with accommodating grooves 40 on both sides;

[0060] The support mechanism 5 includes a shaft 50, a first spring 51, two movable rings 52 and two connecting rods 53;

[0061] The spring passes through the shaft 50, and the two movable rings 52 are located at both ends of the spring and are slidably connected to the shaft 50. The first end of the connecting rod 53 is hinged to the movable ring 52, and the second end is hinged to the base 1. The shaft 50 is set on the accommodating groove 40.

[0062] The connecting rod 53 is hinged to the movable ring 52 and the base 1 respectively. Corresponding mounting ears can be provided at both ends of the connecting rod 53. The mounting ears are rotatably connected to the connecting rod 53 through the rotating shaft. The mounting ears can be connected to the base plate 4 and the movable ring 52 by bolts.

[0063] The first spring 51 is sleeved on the shaft 50, and the movable ring 52 abuts against the first spring 51, so that the spring can support the connecting rod 53 through its own elastic force. Under normal circumstances, the movable rings 52 on both sides of the first spring 51 are away from each other. When the base 1 moves due to the vibration of the pipeline, the connecting rod 53 is forced to change the inclination angle, thereby driving the movable ring 52 to move toward the first spring 51. In the process of the movable ring 52 compressing the first spring 51, the force is offset. Specifically, a receiving groove 40 is respectively provided on both sides of the base plate 4, that is, on the upper and lower sides or left and right sides of the top surface of the base plate 4, and the shaft rod 50 is placed in the receiving groove 40, and a first spring 51 and a movable ring 52 are provided on the shaft rod 50. When the pipeline is vibrated and deflected, the force generating the vibration passes through the pipe clamp 3, the sliding seat 2, and the base 1 in sequence. When the base 1 is subjected to force, it moves toward the base plate 4 and transmits the force to the connecting rod 53. After the connecting rod 53 is subjected to force, it is transmitted to the movable ring 52. The movable ring 52 is subjected to force and moves toward the center area of the shaft rod 50, and compresses the first spring 51 during the movement, slowly offsetting the force, reducing the vibration of the pipeline, and facilitating the installation or sealing connection of the pipeline with higher accuracy and portability.

[0064] The base plate 4 is provided with a receiving groove 40, and the shaft 50 is placed in the receiving groove 40, which can reduce the overall size of the ventilation duct connection structure and improve the connection stability between the base plate 4 and the base 1. The shaft 50 is placed in the receiving groove 40, and the ends of the shaft 50 are fixed to the side walls of the receiving groove 40 by bolt connection.

[0065] In this embodiment 1, by providing an axis rod 50, a first spring 51, a movable ring 52 and a connecting rod 53, the support mechanism 5 not only has the function of supporting the base 1, but also plays a role in buffering and shock absorption. The synergistic force between it and the buffer mechanism can further improve the reliability of the ventilation duct connection structure.

[0066] like Figure 4 As shown, based on the above specific implementation scheme, the buffer assembly 6 of the ventilation duct connection structure includes a mounting seat 60, a second spring 61 and a movable rod 62;

[0067] At least one sliding hole is provided on the outer edges of both sides of the base 1, and the movable rod 62 passes through the sliding hole, and the head of the movable rod 62 is engaged with the base 1;

[0068] The second spring 61 is sleeved around the movable rod 62, which is connected to the mounting base 60. The mounting base 60 is provided on both sides of the outer edge of the base plate 4. By providing the second spring 61 between the base 1 and the base plate 4, and the mounting base 60 and movable rod 62 for connecting the base 1 and the base plate 4, when the base 1 is vibrated by the pipe and moves toward the base plate 4, the second spring 61 can offset the force, thereby preventing a hard collision between the pipe and the pipe clamp 3.

[0069] It should be noted that the second spring 61 provided on the mounting seat 60 can be freely set according to actual needs, and this embodiment does not make the sole limitation here.

[0070] Furthermore, the ventilation duct connection structure includes three movable rods 62 and three second springs 61. The central end surface of the mounting base 60 is higher than the side end surfaces of the mounting base 60. The movable rods 62 are provided on both the central end surface and the side end surfaces of the mounting base 60. The mounting base 60 has two end surfaces at different heights, which allows the second springs 61 mounted on the two different end surfaces to have different response ranges, adapting to vibrations of varying intensities and providing greater connection stability between the base 1 and the bottom plate 4.

[0071] like Figure 3 As shown, on the basis of the above specific embodiment, the sliding seat 2 of the ventilation duct connection structure includes a positioning frame 20 and a slider 21. The cross section of the positioning frame 20 is U-shaped, and the cross section of the slider 21 is T-shaped. The base 1 is provided with a slide groove 10, the positioning hole is located on the top end surface of the base 1, and the slider 21 is located on the bottom end surface of the base 1. One end of the slider 21 passes through the slide groove 10 and is connected to the positioning frame 20.

[0072] The pipe clamp 3 is threadedly connected to both ends of the positioning frame 20 .

[0073] The connection between the positioning frame 20 and the slider 21 can be achieved by bolts or welding. When bolt connection is adopted, threaded holes corresponding to each other are provided on one end of the slider 21 and the positioning frame 20. In specific operation, one end of the slider 21 is first embedded in the slide groove 10, and after the threaded hole of the positioning frame 20 corresponds to the threaded hole of the slider 21, the bolts can be used to tighten.

[0074] like Figure 2 and Figure 3 As shown, further, both ends of the positioning frame 20 of the ventilation duct connection structure are further provided with limiting rods 32 , and the limiting rods 32 are used to limit the travel of the pipe clamp 3 .

[0075] Furthermore, the pipe clamp 3 of the above-mentioned ventilation duct connection structure includes an adjusting rod 30 and a clamping ring 31, the adjusting rod 30 is threadedly connected to the sliding seat 2, the first end of the adjusting rod 30 is connected to the clamping ring 31, the second end of the adjusting rod 30 is provided with a rotating handle, and the clamping ring 31 has an arc-shaped clamping surface.

[0076] Furthermore, an anti-slip structure is provided on the arc-shaped clamping surface of the ventilation duct connecting structure.

[0077] Example 2

[0078] like Figure 6 As shown, this embodiment only describes the differences from Embodiment 1, and the remaining technical features are the same as those of the above embodiment.

[0079] In this embodiment 2, the anti-slip structure provided on the clamping ring 31 is an anti-slip gasket 31a. The anti-slip gasket 31a is made of elastic materials such as rubber or silicone. The anti-slip gasket 31a can increase the contact friction between the surface of the pipe or connecting component.

[0080] Example 3

[0081] like Figure 7 As shown, this embodiment only describes the differences from embodiments 1 to 2, and the remaining technical features are the same as those of the above embodiments.

[0082] In this embodiment 3, the anti-slip structure provided on the clamping ring 31 is an anti-slip rib 31b. The anti-slip rib 31b is made of elastic materials such as rubber or silicone. In addition to providing the contact friction force in embodiment 2, the anti-slip rib 31b can also provide a soft buffer layer for the pipeline.

[0083] Example 4

[0084] like Figure 8 As shown, this embodiment only describes the differences from embodiments 1 to 3, and the remaining technical features are the same as those of the above embodiments.

[0085] In this embodiment 4, the anti-slip structure provided on the clamping ring 31 is an anti-slip protrusion 31c. The anti-slip protrusion 31c is made of elastic materials such as rubber or silicone. The anti-slip protrusion 31c can increase the contact friction between the surface of the pipe or the connecting component.

[0086] While various embodiments of the present invention have been described above, the above descriptions are illustrative and non-exhaustive, and are not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A ventilation duct connection structure, characterized in that: include: A base, wherein both sides of the end surface of the base are provided with sliding seats, and the sliding seats are in sliding cooperation with the base; The clamp is arranged on the sliding seat and includes two pipe clamps arranged opposite to each other. The two pipe clamps enclose a pipe cavity for fixing the pipe, and the distance between the two pipe clamps is adjustable.

2. The ventilation duct connection structure according to claim 1, characterized in that: It also includes a base plate, two symmetrically arranged buffer mechanisms and two symmetrically arranged support mechanisms. The buffer mechanism and the support mechanism are both arranged on the base plate. The buffer mechanism is used to buffer the base, and the support mechanism is used to support the base.

3. The ventilation duct connection structure according to claim 2, characterized in that: The connecting line between the two buffer mechanisms is perpendicular to the connecting line between the two support mechanisms, and the buffer mechanism and the support mechanism are connected to the outer edge of the bottom end surface of the base.

4. The ventilation duct connection structure according to claim 3, characterized in that: Accommodation grooves are provided on both sides of the bottom plate; The support mechanism includes a shaft, a first spring, two movable rings and two connecting rods; The spring passes through the shaft, the two movable rings are located at both ends of the spring and are slidably connected to the shaft, the first end of the connecting rod is hinged to the movable ring, and the second end is hinged to the base, and the shaft is set on the accommodating groove.

5. The ventilation duct connection structure according to claim 3, characterized in that: The buffer assembly includes a mounting seat, a second spring and a movable rod; At least one sliding hole is provided on the outer edges of both sides of the base, the movable rod passes through the sliding hole, and the head of the movable rod is clamped with the base; The second spring is sleeved on the movable rod, the movable rod is connected to the mounting seat, and the mounting seat is arranged on the outer edges of both sides of the bottom plate.

6. The ventilation duct connection structure according to claim 5, characterized in that: There are three movable rods and three second springs. The end surface of the middle portion of the mounting seat is higher than the end surfaces on both sides of the mounting seat. The end surface of the middle portion of the mounting seat and the end surfaces on both sides of the mounting seat are both provided with movable rods.

7. The ventilation duct connection structure according to claim 1, characterized in that: The sliding seat includes a positioning frame and a slider, the cross section of the positioning frame is U-shaped, the cross section of the slider is T-shaped, a slide groove is provided on the base, the positioning hole is located on the top end surface of the base, the slider is located on the bottom end surface of the base, one end of the slider passes through the slide groove and is connected to the positioning frame; The pipe clamp is threadedly connected to both ends of the positioning frame.

8. The ventilation duct connection structure according to claim 7, characterized in that: Limit rods are further provided at both ends of the positioning frame, and the limit rods are used to limit the travel of the pipe clamp.

9. The ventilation duct connection structure according to claim 1, characterized in that: The pipe clamp includes an adjusting rod and a clamping ring. The adjusting rod is threadedly connected to the sliding seat. The first end of the adjusting rod is connected to the clamping ring. The second end of the adjusting rod is provided with a rotating handle. The clamping ring has an arc-shaped clamping surface.

10. The ventilation duct connection structure according to claim 9, characterized in that: The arc-shaped clamping surface is further provided with an anti-slip structure, which is any one of an anti-slip gasket, an anti-slip rib or an anti-slip protrusion.

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